The series specifications can be in any order.
SERIES_SPEC ( TABLE_NAME ( [database-name . ] table name ) , ROW_AXIS ( { TIMECODE | SEQUENCE } ( field ) ) , SERIES_ID ( field-list ) , [ID_SEQUENCE ( instance-identifier-list-json-string )] PAYLOAD ( FIELDS ( field-list ) , CONTENT ( { REAL | COMPLEX | AMPL_PHASE | AMPL_PHASE_RADIANS | AMPL_PHASE_DEGREES | MULTIVAR_REAL | MULTIVAR_COMPLEX | MULTIVAR_ANYTYPE | MULTIVAR_AMPL_PHASE | MULTIVAR_AMPL_PHASE_RADIANS | MULTIVAR_AMPL_PHASE_DEGREES } ) ) [, LAYER ( layer-name ) ] [, INTERVAL ( { time-duration [ , time-zero ] | { integer | float } [ , sequence-zero ] } )] )